Would be pretty awesome to see an extension of mix phx.routes that produces such documentation; phoenix can introspect to your routes, so having a way to markup the routing so it could produce this as well, preventing the need to discover other tooling, would be quite nifty.
The reason this could be worth the effort, besides the nice “batteries included” benefit, is that it could be extended to also include information about e.g. channels.
That said, the last time I did a big node project we used apidoc and it is indeed super nifty, particularly the “try it live” forms it generates.
